[Bug libstdc++/121237] Wrong return value of `condition_variable_any::wait_until`

[rohan at rohanlean dot de via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121237

--- Comment #2 from Rohan Lean <rohan at rohanlean dot de> ---
(The libstdc++ implementation corresponding to that overload also appears to
have the problem, however.)